exquisite balancing from lowest bass notes to the highest treble notes. Has a slight vocal forwardness but the balancing is among the best I have ever heard on any earphone. They actually sounded a bit dull on open listen. I do that just to see where the sound goes after some run in. Opens up like a budding flower in spring. Sound expands in all directions giving excellent body, timbre, imaging very high level of technicalities and that vocal forwardness that not all earphones can pull off correct. Treble is excellent here too just the right amount of sparkle and extension.
Everything is detailed and I mean everything. The tuning is really excellent on them can't really fault too much on the design point of the sound tuning. The Zen gets about 90% of the Lunas ability but has its own character. Sounds absolutely superb after some run in.